Modern Gods and the Fourth Elder War

Military action

An ancient humanoid named Mnemnosyne finds the Lethe Arch and the Akashic Library, enabling native Torians to ascend to godhood. These Modern Gods begin the Fourth (and final) Elder War. During this war the dinosaurs are wiped out by cataclysms caused by the warring gods. The Flying Polyps escape their imprisonment and take their revenge on the Yithians, sabotaging their laboratories in Pnakotus and causing Yggdrasil to grow which destroys the entire city.   The Modern Gods created servitor races, giantkin and dragonkind, to battle the Yithians and mi-go respectively. The Great Race sends its greatest minds to the fifth planet in the solar system, escaping eventually to a distant star near Taurus. The mi-go engineer themselves smaller and smaller bodies until they become as small as atoms and hide from the servants of the gods. The Elder Thing civilization is pushed back to a single city in the antarctic mountains near the south pole.